I've seen some beautiful resin furniture for sale, and I've wondered how they make it. I have two particular examples in mind: the crystal clear (or translucent colored) slabs of resin, and the resin/wood hybrid. Are they using huge pressure chambers to get the perfectly clear finish?

I think these are epoxy resin. Careful mixing and pouring avoid introducing bubbles and long cure times allow any bubbles to leave, as they're not placed under vacuum or pressure.I suggest finding people who have made these and asking them. I've seen a couple on YouTube.